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Daikin Ekrtw


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1.5 m 1.5

Room thermostat

Installation manual

Read this manual attentively before starting up the unit. Do not throw it away. Keep it in your les for future reference. Improper installation or attachment of equipment or accessories could result in electric shock, short-circuit, leaks, re or other damage to the equipment. Be sure only to use accessories made by Daikin which are specically designed for the use with the equipment and have them installed by a professional. If unsure of installation procedures or use, always contact your dealer for advice and information.


1. Introduction... 1 2. Installation of EKRTW.. 2 3. Setting up codes in the installer menu.. 5 4. Technical characteristics.. 10

1. Introduction

The room thermostat EKRTW can be used to control oor heating-only applications and oor heating/cooling applications. It is typically connected to the indoor unit. Refer to the "Typical application examples" in the Installation manual of the indoor unit. In case of oor heating-only applications the room thermostat can also be connected to the individual motorized valve of the oor heating loop. If a oor heating-only application is used in combination with fan coil units each fan coil unit should have its dedicated fan coil thermostat.
EKRTW Room thermostat 4PW44896-1B Installation manual

2. Installation of EKRTW

The EKRTW thermostat is wall-mounted, with supplied screws and plugs. Refer to gure 1. Cabling towards the indoor system (eld supply) should be foreseen in advance taking the suggestions for an ideal installation location into account. Refer to gure 2. Before obtaining access to terminals, all power supply circuits must be interrupted. 3 At the left of the thermostat, gently push the lid. Remove the front cover by pulling it towards you. Unscrew the screw of the cable holder in the bottom left corner of the back part of the thermostat and remove the transparent cable protection. Remove the battery insulator.
Drill holes in the wall taking the dimensions of the thermostat into account and insert the supplied plugs in the holes. Refer to gure 3 (unit of measurement: mm).
EKRTW Room thermostat 4PW44896-1B
Pass the indoor unit or motorized valve wiring through the back of the thermostat.
According your application, perform the wiring.
7a When connected to the indoor unit, wire the indoor unit and the thermostat as shown below. EKHB(H/X)008 EKHB(H/X)016

H C L N X2M 3 4


H C L N 15 13

Heating demand Cooling demand
For heating-only applications, wire 17-C or 2-C is not to be installed. Use wire size 0.75~1.50 mm2.
7b When connected to the motorized valve, wire the motorized valve and the thermostat as shown below (for heating-only applications).


1N~50 Hz 230 VAC L N
The output relays (H and C are voltage-free contacts) can handle a maximum load of 100 mA - 230 VAC. Make sure to protect the power supply with a fuse of 3 A. Select the power cable in accordance with relevant local and national regulations. A main switch or other means for disconnection, having a contact separation in all poles, must be incorporated in the xed wiring in accordance with relevant local and national legislation. 8 Fasten the thermostat with the supplied screws. Be careful not to pinch the wiring when fastening.

Put the transparent cable protection back into place and x the cable protection with the screw.
10 Close the thermostat cover. 11 Remove the protective lm from the LCD.
3. Setting up codes in the installer menu
You can set up codes, starting from the time and date menu (in advanced mode).
As a consequence of a customized conguration, it is not abnormal that some codes are no longer accessible.
Activate the advanced mode by pressing > during 5 seconds in OFF mode (D). Navigate to the date and clock setting menu (G) by pressing >. Press > and keep it pressed while now pressing = during 10 seconds. y is displayed next to 4.
Press < or > to consult the current settings of the codes. To modify codes, press +, - or =. The value is ashing when being modied. Press + or - to increase or decrease the code value by 1 step. To put a code back to its default value, press + and - at the same time. Press = to save your selection. You can exit this code menu by going to the "/" code and pressing =.
Set-up for heating/cooling applications
For heating/cooling applications, set the following codes: 1st code 2nd code Description Cooling mode present? Required setting

Overview of all codes

Following codes can be changed in the installer menu: 1st 2nd code code Description Default Range Step 0.1C

Readout codes

01 + R Calibration of
internal sensor. Actual temperature + offset are displayed. The h symbol appears when the offset deviates from 0.

Offset = 0 Offset: 5C~5C

Installation codes

Cooling mode present?

1st 2nd code code


Temperature control codes Daikin advizes not to change below temperature control parameters. They are set for an optimal use of the oor cooling/ heating application.
Use proportional band control? Hysteresis value proportional band (heating).
(proportional band)/ (hysteresis)

00.5 020

00.5~02.0 010~060

0.1C 1 min.

04 + p Duration 05 + p Minimum "on"

time (heat demand).

002~ 6 04/2

1 min.

06 + p Minimum delay 003
between 2 heating cycles.

001~ 6 04/2

07 + o Duration
proportional band (cooling).


08 + o Minimum "on"

time (cool demand).

002~ 6 07/2

09 + o Minimum delay 003

between 2 cooling cycles. Value of proportional band. Compensating value.

001~ 6 07/2



Description Upper setpoint limitation. Lower setpoint limitation.

Step 1C 1C

037 004

22.0~37.0 04.0~20.0

Schedule timer codes
Enable cooling/ heating link for the userdened schedules 1 and 2? When enabled and a userdened schedule is selected in the schedule timer setting menu: in heating mode, schedule 1 will be active; in cooling mode, schedule 2 will be active.

Miscellaneous codes

Daylight saving time implementation. (installation check).
02 + p Forced heating 03 + o Forced cooling
(installation check). Reset all 15 + settings back to factory conguration. Press = during 5 seconds. The complete LCD is shown to conrm all settings are reset.
4. Technical characteristics
Temperature read out Operating temperature Setpoint temperature range Electrical protection Steps of 0.1C 0C~50C 4C~37C in steps of 0.5C
Class II - IP30 (indoor use, polution degree 2) Feeding and autonomy 3 alkaline batteries AA.LR6 1.5 V approximately 2 years (depending on usage conditions) Output relays Maximum load 100 mA - 230 VAC Immunity against voltage Category III (2.5 kV) surges Type of automatic action 1C of the thermostat


Copyright Daikin



technical data


Daikins unique position as a manufacturer of air conditioning equipment, compressors and refrigerants has led to its close involvement in environmental issues. For several years Daikin has had the intention to become a leader in the provision of products that have limited impact on the environment. This challenge demands the eco design and development of a wide range of products and an energy management system, resulting in energy conservation and a reduction of waste.
Het ISO14001 assures an effective environmental management system in order to help protect human health and the environment from potential impact of our activities, products and services and to assist in maintaining and improving the quality of the environment.
Daikin Europe N.V. is approved by LRQA for its Quality Management System in accordance with the ISO9001 standard. ISO9001 pertains to quality assurance regarding design, development, manufacturing as well as to services related to the product.
The present publication is drawn up by way of information only and does not constitute an offer binding upon Daikin Europe N.V. Daikin Europe N.V. has compiled the content of this publication to the best of its knowledge. No express or implied warranty is given for the completeness, accuracy, reliability or fitness for particular purpose of its content and the products and services presented therein. Specifications are subject to change without prior notice. Daikin Europe N.V. explicitly rejects any liability for any direct or indirect damage, In the broadest sense, arising from or related to the use and/or interpretation of this publication. All content is copyrighted by Daikin Europe N.V.
Daikin units comply with the European regulations that guarantee the safety of the product.
Naamloze Vennootschap Zandvoordestraat 300 B-8400 Ostend, Belgium BTW: BE 336 RPR Oostende
Daikin Europe N.V. participates in the Eurovent Certification Programme for Air Conditioners (AC), Liquid Chilling Packages (LCP) and Fan Coil Units (FC); the certified data of certified models are listed in the Eurovent Directory.


EEDEN08-720 - 06/2008 Printed in Belgium by Goekint Graphics Copyright Daikin

Room thermostat EKRTW

Features. 5 Specifications. 6
Technical Specifications. Electrical Specifications.
Options. 7 Dimensional drawing & centre of gravity. 8

Dimensional drawing

Wiring diagram. 9
External connection diagram.

Altherma Room thermostat

s o m r e a h m t r e W mh T otR olK ERA




Unit Height Width Depth Packing Height Width Depth mm mm mm mm mm mm g g g C C C C C


Carton 55 -20~60 0~50 4-37 4-37 0.5 Yes Proportional band Heating only Heating and cooling Comfort function mode (= comfort setpoint) Reduced function mode (=night setback setpoint) Scheduled function mode(= schedule timer) Number of setpoint changes
Weight Packing Ambient temperature Temperature setting range Clock
Unit Material Weight Storage Operation Heating Cooling

Net Gross

Temperature setting resolution Regulation function Features Item

Note Item

12/day Holiday function mode Off function (with integrated frost protection) Setpoint limitation Keylock function

Voltage A

Power Supply Connection
battery powered 3* AA-LR6 (alkaline) Wired 0.1
Maximum rated switching current (at 230VAC)


Additional information:
comfort function mode reduced function mode
scheduled function mode holiday function mode off function setpoint limitation floor temperature protection
Use this mode for a fixed temperature on comfort level. (comfort setpoint default on 21C in heating mode, 24C in cooling mode) Use this mode for a fixed temperature on reduced level. (reduced setpoint default on 17C in heating mode, 28C in cooling mode) Use this mode to let your installation be controlled by the schedule timer. The actions programmed in the schedule timer will be executed automatically according to the actual time. This function uses the scheduled temperature setpoint. Use this mode to set a fixed temperature during a long absence. Use this mode to switch of your installation. Integrated frost protection remains activated. (frost protection default on 4C in heating mode) Use this function to limit the setpoint range for the end customer. Use this function to set a maximum and a minimum floor temperature.


Dimensional drawing & centre of gravity



Wiring diagram

External connection diagram
Standard parts Power supply

Outdoor unit

Unit power supply: 230V + earth Backup heater power supply (3/6/9kW): 400V or 230V + earth 3 core X1M:L-N-Earth
For more details please check unit wiring diagram
Optional power supply Booster heater power supply (3kW): 400V or 230V + earth


4 core

3 or 4 core

3 core

Optional parts

Field supply


Sanitary tank Room thermostat
Power supply booster heater 4 core 5 core X1M:7-8-Earth A3P (optional)
Q2L - Clixon booster heater

230V or 400V

NO valve: NC valve:

2 core

2 way valve
M2S (EKHBX Units) for cooling mode

R5T - Thermistor water temperature
2 core Signal Thermistor cable Note: min. distance to power cable = 3cm

3 way valve

M3S (when EKSWW is installed) selection sanitary-floorheating

Indoor unit

User interface




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